The Last Supper and the Crucifixion are inextricably united.

Anti-Catholic asks:

The Last Supper is not the Sacrifice on the Cross

WHEN did Jesus cry out to Abba to remove this cup from Him : before the Supper of before the Cross?

WHEN was the Sin of believers paid for: at the Supper or on the Cross?

WHEN was propitiation made: at the Supper or on the Cross?

WHEN was the Blood of Christ shed for our forgiveness ; at the Supper or on the Cross?

WHEN was the wrath of God appeased : at the Supper or on the Cross?

WHEN was he pierced for our transgressions, When was he crushed for our iniquities; at the Supper or on the Cross?

WHEN did the Lord lay on him the iniquity of us all; at the Supper or on the Cross?

WHEN was the Lord’s will to crush him and cause him to suffer, and though the Lord makes his life an offering for sin; at the Supper or on the Cross?

WHEN did God make Him who had no sin to be sin for us, so that in Him we might become the righteousness of God;at the Supper or on the Cross?

At what "event " did these thing happen?

Your questions are loaded with misunderstanding. The Last Supper and the Crucifixion are inextricably united.

You see, the Last Supper is the first Mass. And the Mass is our Passover. In order to understand the New Testament Mass, you must understand the Old Testament Passover.

1. In the Old Testament, 

a. The Passover Lamb was killed and 
b. The Passover Lamb was eaten.

Those are not two sacrifices, but one. The Passover Lamb was killed in order that it might be eaten.

2. The same in the New Testament.

a. Jesus Christ is the Lamb of God. 
John 1:29
The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.

b. Jesus Christ is also our Passover, sacrificed for us.
1 Corinthians 5:7
Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:

c. He is sacrificed for us in order that He may be eaten:
John 6:57
King James Version (KJV)
57 As the living Father hath sent me, and I live by the Father: so he that eateth me, even he shall live by me.

d. Therefore, Christ released the grace of God from the Cross. But unless you eat of the flesh of the Son of God, you do not apply those graces to your life. And you will die in your sins:
53 Then Jesus said unto them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man, and drink his blood, ye have no life in you.

e. And finally, the Crucifixion is the Sacrifice of the Mass which we participate in when we eat the Body and Blood of our Lord in the Holy Eucharist.

The Passover is the Mass

Where in Scripture do we find the passover becomes the Mass?

Here.

Matthew 26:
16 And from that time he sought opportunity to betray him.
17 Now the first day of the feast of unleavened bread the disciples came to Jesus, saying unto him, Where wilt thou that we prepare for thee to eat the passover?
18 And he said, Go into the city to such a man, and say unto him, The Master saith, My time is at hand; I will keep the passover at thy house with my disciples.

Note that Jesus prepares the disciples for a Passover. But this is what He says during that Passover:
26 And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat; this is my body.
27 And he took the cup, and gave thanks, and gave it to them, saying, Drink ye all of it;
28 For this is my blood of the new testament, which is shed for many for the remission of sins.

That, of course, is a description of the Eucharistic meal.  The very same meal we receive at every Mass.

Jesus prepared the disciples for a Passover. But during that Passover, celebrated the Mass. St. Paul obviously understands this:

1 Corinthians 5:7 Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:

Where in Scripture, do we find that the Jewish Passover becomes the Mass?

Where in Scripture, do we find that the Jewish Passover becomes the Mass?

Today is Holy Thursday and this is what Jesus did on Holy Thursday. He transformed the Jewish Passover into the Christian Mas 
Read More...

Christ is our Passover, as Scripture clearly tells us.

Lutero:

With all due respect, you are showing me nothing except your desperate attempt to fit a square peg into a round hole.
Revelation 5:5 tells us, the Lamb, "the Lion of the tribe of Judah, has triumphed". That is why He alone is worthy to open the scroll. The Lord Jesus died for our sins and God has accepted Calvary as full payment for our redemption. You should also.
Do you not recall what scripture says, that before He was crucified, Jesus, when praying to His Father, said “I have brought you glory on earth bycompleting the work you gave me to do”. And at the cross, our dear savior, before giving up His Spirit, said “It is finished”.

What's finished, redemption? Then you are left out.

Yet here you are, willfully editing the infallible word of God, equating the bloodless sacrifice of your Church’s pagan ritual to the worship given to God in heaven. All because you value the teachings of the Roman Catholic Church over the infallible word of God. Repent before it's too late.

On the contrary, it is you. Christ is our Passover, as Scripture clearly tells us. And Scripture shows us that He continually offers Himself to the Father in our behalf. All you have to do is read the Scriptures with spiritual discernment:

1 Corinthians 2:14
But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
Why would the Lamb be standing in heaven as though slain unless Christ is offering Himself to the Father?

Revelation 5:6

King James Version (KJV)
⁶ And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth.

Sincerely,

De Maria

Where do we find the passover becomes the mass?

Lutero:
Where do we find the passover becomes the mass?

Here.

Matthew 26:16-18

King James Version (KJV)
¹⁶ And from that time he sought opportunity to betray him.
¹⁷ Now the first day of the feast of unleavened bread the disciples came to Jesus, saying unto him, Where wilt thou that we prepare for thee to eat the passover?
¹⁸ And he said, Go into the city to such a man, and say unto him, The Master saith, My time is at hand; I will keep the passover at thy house with my disciples.

Note that Jesus prepares the disciples for a Passover. But this is what He says during that Passover:
²⁶ And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat; this is my body.
²⁷ And he took the cup, and gave thanks, and gave it to them, saying, Drink ye all of it;
²⁸ For this is my blood of the new testament, which is shed for many for the remission of sins.

Jesus prepared the disciples for a Passover. But during that Passover, celebrated the Mass. St. Paul obviously understands this:
1 Corinthians 5:7

King James Version (KJV)
⁷ Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us:

So what does it mean that YOU are now UNLEAVENED?.

St. Paul is using "leavening" in a metaphorical sense. To understand the metaphor, you must go to the Old Testament. Before the Passover, the Jews were supposed to clean house throw out all leavening:
Exodus 12:15

King James Version (KJV)
¹⁵ Seven days shall ye eat unleavened bread; even the first day ye shall put away leaven out of your houses: for whosoever eateth leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.

When St. Paul says, Purge out therefore the old leaven, he is referring to sin. We become one bread, one body with Christ. And before we eat of the Eucharist, our Passover, we must examine ourselves:

1 Corinthians 11:28-30

King James Version (KJV)
²⁸ But let a man examine himself, and so let him eat of that bread, and drink of that cup.
²⁹ For he that eateth and drinketh unworthily, eateth and drinketh damnation to himself, not discerning the Lord's body.
³⁰ For this cause many are weak and sickly among you, and many sleep.

When we unite ourselves to Christ in the Holy Eucharist, we must be a pure lump, that ye may be a new lump, as ye are unleavened, without sin.

Where does scripture say if they did not eat the lamb they would die?

Hebrews 10:

King James Version (KJV)
²⁵ Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.
²⁶ For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
²⁷ But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
²⁸He that despised Moses' law died without mercy under two or three witnesses:

I know there was something they had to do to preserve their lives.. but it was not to eat the lamb ... infact they were told to burn the lamb they did not eat.. so what was the sign they were to use to save their lives?

To mark the doorposts with the blood.

First you have to show where God commanded the "mass "as a new passover ...

On the contrary, you have to show where Scripture says that the Mass is not the Passover. I have shown you where our Traditions and doctrines are in line with Scripture. You have shown nothing from Scripture. Absolutely nothing.

What you do is isogesus..

What you offer is mere opinion with no support.

you look up scripture or read it to support what you want it to say . The passover was once a year as a memorial commandment ..it pointed to Christ

Exactly! It pointed to Christ. Because Christ is the True Passover. And long ago, it was prophecied that Christ would become the Daily Offering:

Malachi 1:11

King James Version (KJV)
¹¹ For from the rising of the sun even unto the going down of the same my name shall be great among the Gentiles; and in every place incense shall be offered unto my name, and a pure offering: for my name shall be great among the heathen, saith the Lord of hosts.

It is indeed a fearful thing to fall into the hands of the living God..because there was only ONE sacrifice for sin.. and that was on Calvary.. there are no more daily sacrifices

It is that same sacrifice of Calvary which we offer and consume. 

Maria.. what did the cross accomplish ? How is is sufficient to you?

Jesus accomplished the salvation of all who OBEY Him on the Cross. 

Hebrews 5:

King James Version (KJV)
⁸ Though he were a Son, yet learned he obedience by the things which he suffered;


⁹ And being made perfect, he became the author of eternal salvation unto all them that obey him;

In so doing, He established an example that we should follow in His steps:

1 Peter 2:21

King James Version (KJV)
²¹ For even hereunto were ye called: because Christ also suffered for us, leaving us an example, that ye should follow his steps:

Sincerely,

De Maria

Not having any understanding of our Jewish forebears

Cat says:
I would second this in that a lot of misunderstanding of just what is practiced by Catholics is the result of not having any understanding of our Jewish forebears, and their practices and beliefs.

There is a saying "...scratch a Catholic...and you find a Jew underneath...". A lot of what I read here in terms of mis-presenting and mis-stating Catholic understanding, practice and belief is by those who appear to know absolutely nothing of Judaism.

Reforma says:

"Behold, I will make them of the synagogue of Satan, which say they are Jews, and are not, but do lie; behold, I will make them to come and worship before thy feet, and to know that I have loved thee." (Rev. 3:9)

Let's see that verse in context:
⁷ And to the angel of the church in Philadelphia write; These things saith he that is holy, he that is true, he that hath the key of David, he that openeth, and no man shutteth; and shutteth, and no man openeth;
⁸I know thy works: behold, I have set before thee an open door, and no man can shut it: for thou hast a little strength, and hast kept my word, and hast not denied my name.
⁹ Behold, I will make them of the synagogue of Satan, which say they are Jews, and are not, but do lie; behold, I will make them to come and worship before thy feet, and to know that I have loved thee.
¹⁰ Because thou hast kept the word of my patience, I also will keep thee from the hour of temptation, which shall come upon all the world, to try them that dwell upon the earth.
¹¹ Behold, I come quickly: hold that fast which thou hast, that no man take thy crown.

Now, those four little words prove that the Catholic Church is the New Jerusalem and Catholics the New Jews. Because Protestants disdain the works of God and pretend that you can justify yourself by your claims of faith alone. A doctrine of demons which contradicts the Word of God:

James 2:24

King James Version (KJV)
²⁴ Ye see then how that by works a man is justified, and not by faith only.

1 Timothy 4:1
King James Version (KJV)
Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils

But all the Baptized are Jews inwardly:
Colossians 2:

King James Version (KJV)
¹¹ In whom also ye are circumcised with the circumcision made without hands, in putting off the body of the sins of the flesh by the circumcision of Christ: ¹² Buried with him in baptism, wherein also ye are risen with him through the faith of the operation of God, who hath raised him from the dead.


Romans 2:28-29

King James Version (KJV)
²⁸ For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh:
²⁹ But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.

But Protestants believe unbiblical doctrines, disdain the works commanded by God and reject the efficacy of Baptism. Therefore, it is Protestants who have condemned themselves:
Mark 16:16

King James Version (KJV)
¹⁶ He that believeth and is baptized shall be saved; but he that believeth not shall be damned.

See also What is the advantage of the Catholic?  and  Passover/Mass.

Sincerely,

De Maria